LPN exams renal and urinary practice questions set 2

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The correct answer is C: Tamsulosin. It is the most appropriate alpha-blocker for the elderly man with enlarged prostate and overflow incontinence because of its selective action on alpha-1A receptors in the prostate, leading to relaxation of smooth muscle without significantly affecting blood pressure. Rationale: 1. Prazosin (Choice A) and Terazosin (Choice D) are non-selective alpha-blockers that can cause significant blood pressure lowering due to their action on alpha-1 receptors in blood vessels, which may not be suitable for this patient. 2. Phentolamine (Choice B) is also a non-selective alpha-blocker that can lead to significant blood pressure reduction, making it unsuitable for this patient. 3. Tamsulosin (Choice C) is a selective alpha-1A blocker, primarily acting on the prostate, with minimal impact on blood pressure, making it the most appropriate choice for this patient.

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The correct answer is D: Tetracyclines. Tetracyclines bind to the 30S ribosomal subunit and inhibit bacterial protein synthesis, making them effective against Chlamydia and Ureaplasma causing non-gonococcal urethritis. They should be avoided in patients with liver disease due to the potential for hepatotoxicity. A: Daptomycin is not the correct choice as it works by disrupting bacterial cell membrane function, not by binding to ribosomes. B: Carbapenems are broad-spectrum antibiotics that inhibit cell wall synthesis by binding to penicillin-binding proteins, not ribosomes. C: Cephalosporins are beta-lactam antibiotics that inhibit cell wall synthesis, not protein synthesis by binding to ribosomes. In summary, tetracyclines are the drug of choice for the given condition due to their mechanism of action on ribosomes, while the other choices are incorrect as they target different

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The correct answer is A: Two nucleoside reverse transcriptase inhibitors (NRTIs) + one protease inhibitor (PI). This regimen is typically reserved for advanced cases of AIDS or repeated treatment failures due to its high potency and effectiveness in suppressing HIV replication. NRTIs work by blocking the reverse transcriptase enzyme, while PIs inhibit the protease enzyme, both essential for HIV replication. Combining two NRTIs with a PI targets the virus at multiple stages, reducing the likelihood of resistance development. In contrast, the other choices (B, C, D) do not offer the same level of efficacy or resistance prevention as the combination in choice A. B: Three NRTIs may lead to increased toxicity without added benefit. C: Two NRTIs + one non-NRTI lacks the potency of a PI in advanced cases. D: One NRTI + one non-NRTI + one PI is not as effective as two NRTIs + one PI in suppressing

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The correct answer is D. Pain with bladder filling that is transiently relieved by urination is a classic symptom of interstitial cystitis. This pattern of pain is due to inflammation of the bladder lining, which worsens as the bladder fills with urine and improves temporarily after urination. This finding is specific to interstitial cystitis and not typically seen in other conditions. Choices A, B, and C are incorrect: A: Residual urine greater than 200 mL is more indicative of bladder outlet obstruction or neurogenic bladder dysfunction, not specifically interstitial cystitis. B: A large, atonic bladder on urodynamic testing is suggestive of neurogenic bladder or bladder outlet obstruction, not interstitial cystitis. C: A voiding pattern indicating psychogenic urinary retention is more likely related to psychological factors affecting bladder function, not interstitial cystitis.

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Step 1: Chest pain that is not relieved by oxygen therapy alone suggests that the cause of the pain is not related to a lack of oxygen to the heart muscle. Step 2: Acute myocardial infarction (heart attack) is caused by a blockage in the coronary arteries, leading to reduced blood flow and oxygen to the heart muscle. Step 3: If the chest pain is not affected by oxygen therapy, it indicates that the pain is likely due to a problem other than lack of oxygen, such as a heart attack. Step 4: Therefore, choice B is the correct answer as it points to a symptom consistent with an acute myocardial infarction. Summary: Choices A and C mention relief or lack of relief of chest pain with nitroglycerin, which is typically used for angina and may not necessarily indicate a heart attack. Choice D, cyanosis, is a late sign of inadequate oxygenation and not specific to an acute myocardial infarction

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The correct answer is A: Benzathine penicillin. Benzathine penicillin has the longest duration of action among the choices because it is formulated as a salt that releases the active drug slowly over an extended period. The benzathine salt forms a depot at the injection site, leading to a sustained release of penicillin into the bloodstream. This results in a prolonged therapeutic effect and less frequent dosing compared to other penicillin preparations. Summary: - Choice B: Sodium penicillin has a shorter duration of action as it gets rapidly absorbed and eliminated from the body. - Choice C: Potassium penicillin is not a standard form of penicillin and does not exist as a distinct preparation. - Choice D: Procaine penicillin has an intermediate duration of action compared to benzathine penicillin due to the addition of procaine for local anesthesia, but it is not as long-acting.

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The correct answer is D: blood hydrostatic pressure. Glomerular filtrate is produced as a result of the pressure exerted by the blood in the glomerular capillaries forcing water and small solutes into the Bowman's capsule. This pressure, known as blood hydrostatic pressure, is the driving force for the initial filtration of blood in the kidneys. Rationale: 1. A: Tubule secretion is the process by which substances are actively transported from the blood into the renal tubules, not the initial production of glomerular filtrate. 2. B: Facilitated diffusion is a passive transport process that requires specific carrier proteins, not a mechanism for producing glomerular filtrate. 3. C: Blood colloid osmotic pressure is the pressure exerted by proteins in the blood that tends to pull water back into the capillaries, opposing filtration, not causing the production of glomerular filtrate.

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The correct answer is B: Nevirapine. Nevirapine is a non-nucleoside reverse transcriptase inhibitor (NNRTI) that directly inhibits HIV-reverse transcriptase without needing intracellular activation. It binds directly to the enzyme's active site, preventing the conversion of viral RNA to DNA. Rationale: 1. Nelnavir (A) is a protease inhibitor that works by blocking the protease enzyme needed for viral replication, not reverse transcriptase inhibition. 2. Stavudine (C) and Didanosine (D) are nucleoside reverse transcriptase inhibitors (NRTIs) that require intracellular phosphorylation to become active, unlike Nevirapine. In summary, Nevirapine is the correct answer as it directly inhibits HIV-reverse transcriptase without needing intracellular activation, distinguishing it from the other choices which belong to different drug classes or require intracellular phosphorylation.

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The correct answer is D: Atropine. In third-degree AV block, the electrical signals from the atria to the ventricles are completely blocked. Atropine works by blocking the parasympathetic nervous system, which can further decrease the heart rate in a patient with bradycardia. In this scenario, avoiding Atropine is crucial to prevent worsening bradycardia. Epinephrine (A) and Dopamine (B) are sympathomimetic agents that can help increase heart rate and blood pressure, making them suitable choices in this situation. Dobutamine (C) is a positive inotrope that can increase heart contractility and may be beneficial in improving cardiac output in a hypotensive patient. In summary, Atropine should be avoided in a patient with third-degree AV block and symptomatic bradycardia to prevent further decreasing the heart rate, while the other options can be considered to help improve hem

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The correct answer is C: Nitroglycerin should be avoided in a patient taking sildenafil because both drugs can cause a significant drop in blood pressure leading to severe hypotension, syncope, or even cardiovascular collapse. Nitroglycerin is a potent vasodilator, and when combined with sildenafil (a phosphodiesterase type 5 inhibitor), the additive vasodilatory effects can result in dangerous hypotension. A: Amlodipine and B: Diltiazem are calcium channel blockers that are commonly used in combination with sildenafil for the treatment of hypertension and angina. They work through different mechanisms and do not have a significant interaction with sildenafil. D: Metoprolol is a beta-blocker that can be safely used with sildenafil. It helps in reducing heart rate and blood pressure, and its combination with sildenafil can have a beneficial effect in patients with angina.